scholarly journals Collation Efficiency of Poly(Vinyl Alcohol) and Alginate Membranes with Iron-Based Magnetic Organic/Inorganic Fillers in Pervaporative Dehydration of Ethanol

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4152
Author(s):  
Gabriela Dudek ◽  
Roman Turczyn ◽  
David Djurado
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration ◽  
Iron Particles ◽  
Physico Chemical ◽  
Iron Based ◽  
Inorganic Fillers ◽  
Best Parameters

Hybrid poly(vinyl alcohol) and alginate membranes were investigated in the process of ethanol dehydration by pervaporation. As a filler, three types of particles containing iron element, i.e., hematite, magnetite, and iron(III) acetyloacetonate were used. The parameters describing transport properties and effectiveness of investigated membranes were evaluated. Additionally, the physico-chemical properties of the resulting membranes were studied. The influence of polymer matrix, choice of iron particles and their content in terms of effectiveness of membranes in the process of ethanol dehydration were considered. The results showed that hybrid alginate membranes were characterized by a better separation factor, while poly(vinyl alcohol) membranes by a better flux. The best parameters were obtained for membranes filled with 7 wt% of iron(III) acetyloacetonate. The separation factor and pervaporative separation index were equal to 19.69 and 15,998 g⋅m−2⋅h−1 for alginate membrane and 11.75 and 14,878 g⋅m−2⋅h−1 for poly(vinyl alcohol) membrane, respectively.

High Performance Poly (Vinyl Alcohol)-Zeolite LTA Composite Membranes for Ethanol Dehydration Pervaporation

2011 ◽  
Vol 287-290 ◽  
pp. 2053-2056
Author(s):  
Zhen Huang ◽  
Wei Juan Jiang ◽  
Xiao Han Shi ◽  
Li Jun Teng
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Composite Membranes ◽  
Ethanol Solution ◽  
Poly Vinyl Alcohol ◽  
Processing Temperature ◽  
Ethanol Dehydration ◽  
Zeolite Lta ◽  
Separation Performances

Three-layered zeolite LTA-filled poly (vinyl alcohol) (PVA) composite membranes have been fabricated for water removal from highly concentrated ethanol solution by means of pervaporation. Higher separation factor and higher fluxes are both achieved after adding zeolite 3A, 4A and 5A. Through evaluating separation factor and permeation flux, separation performances of the composite membranes are elucidated in terms of the zeolite pore size and processing temperature.

scholarly journals Preparation of graphene oxide/poly(vinyl alcohol) composite membrane and pervaporation performance for ethanol dehydration

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15457-15465 ◽  
Author(s):  
Xue Cheng ◽  
Weibin Cai ◽  
Xiaohan Chen ◽  
Zhen Shi ◽  
Jiding Li
Keyword(s):  
Graphene Oxide ◽  
Composite Membrane ◽  
Separation Factor ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

The separation factor of the composite GOP-2.0 membranes could reach 3 059, which is 16 times higher than PVA membranes.

scholarly journals New crosslinked cast films based on poly(vinyl alcohol): Preparation and physico-chemical properties

2014 ◽  
Vol 8 (12) ◽  
pp. 941-952 ◽  
Author(s):  
C. Birck ◽  
S. Degoutin ◽  
N. Tabary ◽  
V. Miri ◽  
M. Bacquet
Keyword(s):  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Cast Films ◽  
Physico Chemical

scholarly journals Novel cross-linked poly(vinyl alcohol)-based electrolyte membranes for fuel cell applications

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26521-26527 ◽  
Author(s):  
Poonkuzhali Kulasekaran ◽  
Berlina Maria Mahimai ◽  
Paradesi Deivanayagam
Keyword(s):  
Fuel Cell ◽  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Promising Candidate ◽  
Physico Chemical ◽  
Blend Membranes ◽  
Electrolyte Membranes ◽  
Sulfonated Poly

A series of cross-linked poly(vinyl alcohol)-sulfonated poly(ether sulfone) blend membranes were prepared. The studies of physico-chemical properties revealed that the reported membranes are promising candidate for PEMFC applications.

scholarly journals Composite Poly(vinyl alcohol)-Based Nanofibers Embedding Differently-Shaped Gold Nanoparticles: Preparation and Characterization

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1604
Author(s):  
Andrea Dodero ◽  
Maila Castellano ◽  
Paola Lova ◽  
Massimo Ottonelli ◽  
Elisabetta Brunengo ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Ad Hoc ◽  
Chemical Reduction ◽  
Chemical Properties ◽  
Single Step ◽  
Gold Nanostructures ◽  
Poly Vinyl Alcohol ◽  
Spherical Nanoparticles ◽  
Potential Applications ◽  
New Perspective

Poly(vinyl alcohol) nanofibrous mats containing ad hoc synthesized gold nanostructures were prepared via a single-step electrospinning procedure and investigated as a novel composite platform with several potential applications. Specifically, the effect of differently shaped and sized gold nanostructures on the resulting mat physical-chemical properties was investigated. In detail, nearly spherical nanoparticles and nanorods were first synthesized through a chemical reduction of gold precursors in water by using (hexadecyl)trimethylammonium bromide as the stabilizing agent. These nanostructures were then dispersed in poly(vinyl alcohol) aqueous solutions to prepare nanofibrous mats, which were then stabilized via a humble thermal treatment able to enhance their thermal stability and water resistance. Remarkably, the nanostructure type was proven to influence the mesh morphology, with the small spherical nanoparticles and the large nanorods leading to thinner well defined or bigger defect-rich nanofibers, respectively. Finally, the good mechanical properties shown by the prepared composite mats suggest their ease of handleability thereby opening new perspective applications.

Effect of silver-nanoparticles generated in poly (vinyl alcohol) membranes on ethanol dehydration via pervaporation

2019 ◽  
Vol 27 (7) ◽  
pp. 1595-1607 ◽  
Author(s):  
Asmaa Selim ◽  
Andras Jozsef Toth ◽  
Daniel Fozer ◽  
Eniko Haaz ◽  
Nóra Valentínyi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

scholarly journals Poly(vinyl alcohol)-Modified Membranes by Ti3C2Tx for Ethanol Dehydration via Pervaporation

ACS Omega ◽  
2020 ◽  
Vol 5 (12) ◽  
pp. 6277-6287
Author(s):  
Weibin Cai ◽  
Xue Cheng ◽  
Xiaohan Chen ◽  
Jiding Li ◽  
Junqi Pei
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

scholarly journals In situ sol-gel synthesis of hyaluronan derivatives bio-nanocomposite hydrogels

2019 ◽  
Vol 6 (5) ◽  
pp. 249-258 ◽  
Author(s):  
U D’Amora ◽  
A Ronca ◽  
M G Raucci ◽  
S M Dozio ◽  
H Lin ◽  
...  
Keyword(s):  
Sol Gel ◽  
Chemical Properties ◽  
Filler Concentration ◽  
Similar Degree ◽  
Nanocomposite Hydrogels ◽  
Physico Chemical ◽  
Inorganic Fillers ◽  
Sol Gel Synthesis ◽  
Physical Blending

Abstract The main driving idea of the present study was the comparison between two different chemical modifications of hyaluronic acid (HA) followed by the development of nanocomposite hydrogels directly in situ by biomineralization of photocrosslinkable HA polymers through sol-gel synthesis. In this way, it has been possible to overcome some limitations due to classical approaches based on the physical blending of inorganic fillers into polymer matrix. To this aim, methacrylated and maleated HA, synthesized with similar degree of substitution (DS) were compared in terms of mechanical and physico-chemical properties. The success of in situ biomineralization was highlighted by reflect Fourier transform infrared spectroscopy and thermogravimetric analysis. Furthermore, mechanical characterization demonstrated the reinforcing effect of inorganic fillers evidencing a strong correlation with DS. The swelling behavior resulted to be correlated with filler concentration. Finally, the cytotoxicity tests revealed the absence of toxic components and an increase of cell proliferation over culture time was observed, highlighting these bio-nanocomposite hyaluronan derivatives as biocompatible hydrogel with tunable properties.

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